Hastelloy C276 flanges binne makke fan in nikkel-chromium-molybdeen alloy neamd Hastelloy. De gearstalling befettet 50,99% nikkel, 14,5% chromium, 15% molybdeen en koalstof, mangaan, silisium, swevel, kobalt, izer en fosfor. Hastelloy C276-flenzen hawwe in heech smeltpunt fan 1370 graden Celsius.